There are a few ways to attach a fireplace mantel. One way is to use metal brackets that are screwed into the wall and the mantel screws into the brackets. Another way is to use L-brackets that are nailed or screwed into the wall and the mantel sits on top of them. A third way is to use an iron strap that is hammered onto the wall and then the mantel hangs from that strap.

Mantels are often attached to the wall with metal brackets that are hidden behind the molding. Other methods of attachment include screws or lag bolts that go into the wall studs, or specially designed anchors that are inserted into the mortar between the bricks.